#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#define NR_END 1
#define FREE_ARG char*

void nrerror(char error_text[])
/* Numerical Recipes standard error handler */ {
    fprintf(stderr, "Numerical Recipes run-time error...\n");
    fprintf(stderr, "%s\n", error_text);
    fprintf(stderr, "...now exiting to system...\n");
    exit(1);
}

float *vector(long nl, long nh)
/* allocate a float vector with subscript range v[nl..nh] */ {
    float *v;

    v = (float *) malloc((size_t) ((nh - nl + 1 + NR_END) * sizeof (float)));
    if (!v) nrerror("allocation failure in vector()");
    return v - nl + NR_END;
}

int *ivector(long nl, long nh)
/* allocate an int vector with subscript range v[nl..nh] */ {
    int *v;

    v = (int *) malloc((size_t) ((nh - nl + 1 + NR_END) * sizeof (int)));
    if (!v) nrerror("allocation failure in ivector()");
    return v - nl + NR_END;
}

unsigned char *cvector(long nl, long nh)
/* allocate an unsigned char vector with subscript range v[nl..nh] */ {
    unsigned char *v;

    v = (unsigned char *) malloc((size_t) ((nh - nl + 1 + NR_END) * sizeof (unsigned char)));
    if (!v) nrerror("allocation failure in cvector()");
    return v - nl + NR_END;
}

unsigned long *lvector(long nl, long nh)
/* allocate an unsigned long vector with subscript range v[nl..nh] */ {
    unsigned long *v;

    v = (unsigned long *) malloc((size_t) ((nh - nl + 1 + NR_END) * sizeof (long)));
    if (!v) nrerror("allocation failure in lvector()");
    return v - nl + NR_END;
}

double *dvector(long nl, long nh)
/* allocate a double vector with subscript range v[nl..nh] */ {
    double *v;

    v = (double *) malloc((size_t) ((nh - nl + 1 + NR_END) * sizeof (double)));
    if (!v) nrerror("allocation failure in dvector()");
    return v - nl + NR_END;
}

float **matrix(long nrl, long nrh, long ncl, long nch)
/* allocate a float matrix with subscript range m[nrl..nrh][ncl..nch] */ {
    long i, nrow = nrh - nrl + 1, ncol = nch - ncl + 1;
    float **m;

    /* allocate pointers to rows */
    m = (float **) malloc((size_t) ((nrow + NR_END) * sizeof (float*)));
    if (!m) nrerror("allocation failure 1 in matrix()");
    m += NR_END;
    m -= nrl;

    /* allocate rows and set pointers to them */
    m[nrl] = (float *) malloc((size_t) ((nrow * ncol + NR_END) * sizeof (float)));
    if (!m[nrl]) nrerror("allocation failure 2 in matrix()");
    m[nrl] += NR_END;
    m[nrl] -= ncl;

    for (i = nrl + 1; i <= nrh; i++) m[i] = m[i - 1] + ncol;

    /* return pointer to array of pointers to rows */
    return m;
}

double **dmatrix(long nrl, long nrh, long ncl, long nch)
/* allocate a double matrix with subscript range m[nrl..nrh][ncl..nch] */ {
    long i, nrow = nrh - nrl + 1, ncol = nch - ncl + 1;
    double **m;

    /* allocate pointers to rows */
    m = (double **) malloc((size_t) ((nrow + NR_END) * sizeof (double*)));
    if (!m) nrerror("allocation failure 1 in matrix()");
    m += NR_END;
    m -= nrl;

    /* allocate rows and set pointers to them */
    m[nrl] = (double *) malloc((size_t) ((nrow * ncol + NR_END) * sizeof (double)));
    if (!m[nrl]) nrerror("allocation failure 2 in matrix()");
    m[nrl] += NR_END;
    m[nrl] -= ncl;

    for (i = nrl + 1; i <= nrh; i++) m[i] = m[i - 1] + ncol;

    /* return pointer to array of pointers to rows */
    return m;
}

int **imatrix(long nrl, long nrh, long ncl, long nch)
/* allocate a int matrix with subscript range m[nrl..nrh][ncl..nch] */ {
    long i, nrow = nrh - nrl + 1, ncol = nch - ncl + 1;
    int **m;

    /* allocate pointers to rows */
    m = (int **) malloc((size_t) ((nrow + NR_END) * sizeof (int*)));
    if (!m) nrerror("allocation failure 1 in matrix()");
    m += NR_END;
    m -= nrl;


    /* allocate rows and set pointers to them */
    m[nrl] = (int *) malloc((size_t) ((nrow * ncol + NR_END) * sizeof (int)));
    if (!m[nrl]) nrerror("allocation failure 2 in matrix()");
    m[nrl] += NR_END;
    m[nrl] -= ncl;

    for (i = nrl + 1; i <= nrh; i++) m[i] = m[i - 1] + ncol;

    /* return pointer to array of pointers to rows */
    return m;
}

float **submatrix(float **a, long oldrl, long oldrh, long oldcl, long oldch,
        long newrl, long newcl)
/* point a submatrix [newrl..][newcl..] to a[oldrl..oldrh][oldcl..oldch] */ {
    long i, j, nrow = oldrh - oldrl + 1, ncol = oldcl - newcl;
    float **m;

    /* allocate array of pointers to rows */
    m = (float **) malloc((size_t) ((nrow + NR_END) * sizeof (float*)));
    if (!m) nrerror("allocation failure in submatrix()");
    m += NR_END;
    m -= newrl;

    /* set pointers to rows */
    for (i = oldrl, j = newrl; i <= oldrh; i++, j++) m[j] = a[i] + ncol;

    /* return pointer to array of pointers to rows */
    return m;
}

float **convert_matrix(float *a, long nrl, long nrh, long ncl, long nch)
/* allocate a float matrix m[nrl..nrh][ncl..nch] that points to the matrix
declared in the standard C manner as a[nrow][ncol], where nrow=nrh-nrl+1
and ncol=nch-ncl+1. The routine should be called with the address
&a[0][0] as the first argument. */ {
    long i, j, nrow = nrh - nrl + 1, ncol = nch - ncl + 1;
    float **m;

    /* allocate pointers to rows */
    m = (float **) malloc((size_t) ((nrow + NR_END) * sizeof (float*)));
    if (!m) nrerror("allocation failure in convert_matrix()");
    m += NR_END;
    m -= nrl;

    /* set pointers to rows */
    m[nrl] = a - ncl;
    for (i = 1, j = nrl + 1; i < nrow; i++, j++) m[j] = m[j - 1] + ncol;
    /* return pointer to array of pointers to rows */
    return m;
}

float ***f3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh)
/* allocate a float 3tensor with range t[nrl..nrh][ncl..nch][ndl..ndh] */ {
    long i, j, nrow = nrh - nrl + 1, ncol = nch - ncl + 1, ndep = ndh - ndl + 1;
    float ***t;

    /* allocate pointers to pointers to rows */
    t = (float ***) malloc((size_t) ((nrow + NR_END) * sizeof (float**)));
    if (!t) nrerror("allocation failure 1 in f3tensor()");
    t += NR_END;
    t -= nrl;

    /* allocate pointers to rows and set pointers to them */
    t[nrl] = (float **) malloc((size_t) ((nrow * ncol + NR_END) * sizeof (float*)));
    if (!t[nrl]) nrerror("allocation failure 2 in f3tensor()");
    t[nrl] += NR_END;
    t[nrl] -= ncl;

    /* allocate rows and set pointers to them */
    t[nrl][ncl] = (float *) malloc((size_t) ((nrow * ncol * ndep + NR_END) * sizeof (float)));
    if (!t[nrl][ncl]) nrerror("allocation failure 3 in f3tensor()");
    t[nrl][ncl] += NR_END;
    t[nrl][ncl] -= ndl;

    for (j = ncl + 1; j <= nch; j++) t[nrl][j] = t[nrl][j - 1] + ndep;
    for (i = nrl + 1; i <= nrh; i++) {
        t[i] = t[i - 1] + ncol;
        t[i][ncl] = t[i - 1][ncl] + ncol*ndep;
        for (j = ncl + 1; j <= nch; j++) t[i][j] = t[i][j - 1] + ndep;
    }

    /* return pointer to array of pointers to rows */
    return t;
}

void free_vector(float *v, long nl, long nh)
/* free a float vector allocated with vector() */ {
    free((FREE_ARG) (v + nl - NR_END));
}

void free_ivector(int *v, long nl, long nh)
/* free an int vector allocated with ivector() */ {
    free((FREE_ARG) (v + nl - NR_END));
}

void free_cvector(unsigned char *v, long nl, long nh)
/* free an unsigned char vector allocated with cvector() */ {
    free((FREE_ARG) (v + nl - NR_END));
}

void free_lvector(unsigned long *v, long nl, long nh)
/* free an unsigned long vector allocated with lvector() */ {
    free((FREE_ARG) (v + nl - NR_END));
}

void free_dvector(double *v, long nl, long nh)
/* free a double vector allocated with dvector() */ {
    free((FREE_ARG) (v + nl - NR_END));
}

void free_matrix(float **m, long nrl, long nrh, long ncl, long nch)
/* free a float matrix allocated by matrix() */ {
    free((FREE_ARG) (m[nrl] + ncl - NR_END));
    free((FREE_ARG) (m + nrl - NR_END));
}

void free_dmatrix(double **m, long nrl, long nrh, long ncl, long nch)
/* free a double matrix allocated by dmatrix() */ {
    free((FREE_ARG) (m[nrl] + ncl - NR_END));
    free((FREE_ARG) (m + nrl - NR_END));
}

void free_imatrix(int **m, long nrl, long nrh, long ncl, long nch)
/* free an int matrix allocated by imatrix() */ {
    free((FREE_ARG) (m[nrl] + ncl - NR_END));
    free((FREE_ARG) (m + nrl - NR_END));
}

void free_submatrix(float **b, long nrl, long nrh, long ncl, long nch)
/* free a submatrix allocated by submatrix() */ {
    free((FREE_ARG) (b + nrl - NR_END));
}

void free_convert_matrix(float **b, long nrl, long nrh, long ncl, long nch)
/* free a matrix allocated by convert_matrix() */ {
    free((FREE_ARG) (b + nrl - NR_END));
}

void free_f3tensor(float ***t, long nrl, long nrh, long ncl, long nch,
        long ndl, long ndh)
/* free a float f3tensor allocated by f3tensor() */ {
    free((FREE_ARG) (t[nrl][ncl] + ndl - NR_END));
    free((FREE_ARG) (t[nrl] + ncl - NR_END));
    free((FREE_ARG) (t + nrl - NR_END));
}
